682
FNCA52 TJSJ 130730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST MON JUL 13 2026
DISCUSSION
PERSISTENT RAINFALL DEFICITS, CRITICALLY DRY FUELS, AND ELEVATED
KBDI VALUES CONTINUE ACROSS MUCH OF PUERTO RICO AND THE U.S.
VIRGIN ISLANDS, WITH THE GREATEST CONCERNS ACROSS SOUTHERN PUERTO
RICO, VIEQUES, CULEBRA, AND ST. CROIX. A DRIER-THAN-NORMAL AIR
MASS, MODERATE TO LOCALLY HIGH CONCENTRATIONS OF SAHARAN DUST,
AND BREEZY TO WINDY EASTERLY TRADE WINDS WILL CONTINUE TO SUPPORT
FAVORABLE CONDITIONS FOR WILDFIRE GROWTH. FOR TODAY, RH VALUES
MAY BRIEFLY FALL TO NEAR CRITICAL LEVELS DURING THE LATE MORNING,
PARTICULARLY ACROSS THE SOUTHERN COASTAL PLAINS. WINDS WILL
REMAIN FROM THE EAST WITHG SOUTHEASTERN VARIAITON UP TO 15 MPH
AND WITH GUSTY WINDS.
GIVING THE EXPECTED CONDITIONS, A FIRE DANGER STATEMENT FOR
TODAY.
PRZ014-132000-
SOUTHEAST COASTAL PLAINS-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE NONE SHOWERS NONE
CHANCE PRECIP (%) 0 20 0
TEMP (24H TREND) 93 (+1) 75 (-2) 93
RH % (24H TREND) 46 (-2) 84 (+4) 43
WIND 20FT/EARLY(MPH) E 16 E 13 E 18
WIND 20FT/LATE(MPH) E 17 E 12 SE 18
MIXING HGT(FT-AGL/MSL)5660 4800
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 90560 81600
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-132000-
SOUTHERN HILLS-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 0
TEMP (24H TREND) 89 (+2) 71 (-3) 90
RH % (24H TREND) 59 (-2) 96 (+6) 55
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) E 13 E 13 SE 14
MIXING HGT(FT-AGL/MSL)5860 4980
TRANSPORT WND (MPH) E 16 E 17
VENT RATE (KT-FT) 82040 74700
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-132000-
NORTH COASTAL PLAINS-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 0
TEMP (24H TREND) 91 (+2) 73 (-4) 91
RH % (24H TREND) 61 (-4) 97 (+6) 58
WIND 20FT/EARLY(MPH) E 13 E 19 E 16
WIND 20FT/LATE(MPH) E 21 E 12 E 24
MIXING HGT(FT-AGL/MSL)5770 4990
TRANSPORT WND (MPH) E 17 E 17
VENT RATE (KT-FT) 86550 74850
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-132000-
NORTHERN HILLS-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 0 30
TEMP (24H TREND) 89 (+1) 71 (-3) 90
RH % (24H TREND) 64 (+1) 98 (+4) 58
WIND 20FT/EARLY(MPH) E 12 E 17 E 13
WIND 20FT/LATE(MPH) E 19 E 8 E 21
MIXING HGT(FT-AGL/MSL)6490 5770
TRANSPORT WND (MPH) E 13 E 15
VENT RATE (KT-FT) 71390 75010
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-132000-
WEST COAST-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 30
TEMP (24H TREND) 93 (+1) 74 (-1) 93
RH % (24H TREND) 60 (0) 98 (+7) 56
WIND 20FT/EARLY(MPH) E 13 E 12 E 14
WIND 20FT/LATE(MPH) E 13 E 9 E 16
MIXING HGT(FT-AGL/MSL)5180 4800
TRANSPORT WND (MPH) E 10 E 12
VENT RATE (KT-FT) 46620 48000
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-132000-
EASTERN INTERIOR-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 0 10 0
TEMP (24H TREND) 90 (+3) 72 (-3) 90
RH % (24H TREND) 61 (-3) 98 (+5) 56
WIND 20FT/EARLY(MPH) E 13 E 12 E 14
WIND 20FT/LATE(MPH) E 18 E 13 E 16
MIXING HGT(FT-AGL/MSL)6340 5350
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 95100 85600
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-132000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 10 30 0
TEMP (24H TREND) 85 (+4) 70 (-3) 85
RH % (24H TREND) 69 (-6) 99 (+2) 65
WIND 20FT/EARLY(MPH) E 12 E 10 SE 13
WIND 20FT/LATE(MPH) E 12 E 11 E 14
MIXING HGT(FT-AGL/MSL)5370 4680
TRANSPORT WND (MPH) E 20 E 20
VENT RATE (KT-FT) 91290 79560
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-132000-
CENTRAL MOUNTAIN RANGE-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 40 0 20
TEMP (24H TREND) 88 (+4) 68 (-4) 89
RH % (24H TREND) 65 (-2) 99 (+5) 59
WIND 20FT/EARLY(MPH) E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 6 E 12
MIXING HGT(FT-AGL/MSL)7370 6540
TRANSPORT WND (MPH) SE 9 E 12
VENT RATE (KT-FT) 58960 65400
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-132000-
CAYEY MOUNTAIN RANGE-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR CLEAR
PRECIP TYPE NONE SHOWERS NONE
CHANCE PRECIP (%) 0 20 0
TEMP (24H TREND) 85 (+2) 71 (-2) 85
RH % (24H TREND) 69 (0) 100 (+2) 64
WIND 20FT/EARLY(MPH) E 11 E 10 E 12
WIND 20FT/LATE(MPH) E 12 E 11 E 13
MIXING HGT(FT-AGL/MSL)5820 4800
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 93120 81600
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-132000-
VIEQUES-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 10 20 0
TEMP (24H TREND) 89 (+1) 77 (-2) 89
RH % (24H TREND) 60 (-3) 87 (+1) 58
WIND 20FT/EARLY(MPH) E 14 E 16 E 17
WIND 20FT/LATE(MPH) E 14 E 17 E 17
MIXING HGT(FT-AGL/MSL)2440 4070
TRANSPORT WND (MPH) E 20 E 20
VENT RATE (KT-FT) 41480 69190
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-132000-
CULEBRA-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 10 10 0
TEMP (24H TREND) 91 (+3) 78 (-2) 91
RH % (24H TREND) 61 (-6) 90 (+3) 58
WIND 20FT/EARLY(MPH) E 16 E 16 E 17
WIND 20FT/LATE(MPH) E 14 E 17 E 16
MIXING HGT(FT-AGL/MSL)2480 4090
TRANSPORT WND (MPH) E 21 E 22
VENT RATE (KT-FT) 44640 77710
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-132000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 20 0 0
TEMP (24H TREND) 93 (+1) 75 (-2) 93
RH % (24H TREND) 47 (-2) 83 (+4) 44
WIND 20FT/EARLY(MPH) E 17 E 17 E 20
WIND 20FT/LATE(MPH) SE 19 E 16 SE 23
MIXING HGT(FT-AGL/MSL)5430 4630
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 86880 83340
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-132000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 10 10 0
TEMP (24H TREND) 88 (+2) 77 (-2) 88
RH % (24H TREND) 65 (-4) 91 (+4) 62
WIND 20FT/EARLY(MPH) E 16 E 17 E 17
WIND 20FT/LATE(MPH) E 13 E 18 E 16
MIXING HGT(FT-AGL/MSL)2580 3860
TRANSPORT WND (MPH) E 20 E 21
VENT RATE (KT-FT) 43860 69480
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-132000-
ST CROIX-
330 AM AST MON JUL 13 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 30 10 0
TEMP (24H TREND) 89 (+2) 77 (-2) 89
RH % (24H TREND) 63 (-5) 89 (0) 61
WIND 20FT/EARLY(MPH) E 14 E 16 E 18
WIND 20FT/LATE(MPH) E 14 E 18 E 16
MIXING HGT(FT-AGL/MSL)5260 4540
TRANSPORT WND (MPH) E 21 E 22
VENT RATE (KT-FT) 94680 86260
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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